Export cc module types and mutators needed for JNI testing

JNI testing will need to create basic native shared library
modules, export the minimum mutators and module types for
the required dependencies of a native shared library.

Bug: 80095087
Test: cc_test.go
Change-Id: Ibe7bc88b69cb0851291cb09a4c0c6cdb421b8651
diff --git a/cc/ndk_library.go b/cc/ndk_library.go
index 2709a89..63d9f29 100644
--- a/cc/ndk_library.go
+++ b/cc/ndk_library.go
@@ -61,7 +61,7 @@
 	// These libraries have migrated over to the new ndk_library, which is added
 	// as a variation dependency via depsMutator.
 	ndkMigratedLibs     = []string{}
-	ndkMigratedLibsLock sync.Mutex // protects ndkMigratedLibs writes during parallel beginMutator
+	ndkMigratedLibsLock sync.Mutex // protects ndkMigratedLibs writes during parallel BeginMutator
 )
 
 // Creates a stub shared library based on the provided version file.